Oil and Grease Extraction by EPA 1664

In the Organic Preparation Laboratory a sample of known volume or weight is extracted with solvent or diluted with solvent. The primary methods of extraction are liquid-liquid extraction by separatory funnel for aqueous samples and ultrasonic extraction for soils/sediments. The resultant extract is dried and concentrated prior to employing a final determinative method of analysis. This laboratory also houses two (2) sets of the Horizon Technology SPE-DEX 4700 Controller with eight (8) SPE-DEX 4750 automated solid phase extractors for the gravimetric determination of oil and grease in aqueous matrices using automated solid phase extraction. The Horizon Technology SPEED-VAP 9000 is used for the evaporation of n-hexane.